Band-knife skiving-machine.



I PATENTED NOV. 22, 1904.

.G. 0. JENKINS. BAND KNIFE SKIVING MACHINE.

APPLICATION FILED MAY 12, 1902.

7 SHEETS-SHEET 1.

N0 MODEL.

J- R numm hllljlilllllwlullllllMHMWMIIIMIIIII;

. i NW lllillllllllli lllillfll iilllllllllll lllllllil llllll No. 775,564. PATENTED Nov; 22, 1904.

G. 0. JENKINS. BAND KNIFE SKIVING MACHINE.

APPLICATION FILED MAY 12, 1902.

N0 MODEL. IBEEETS-SHEET 2.

I Na Q l\ Q IN 0 0 a l Q I: 5 I 2 gay, I 13 m o v Ill Q as o 110,775,564. FATENTED NOV. 22, 1904.

G. 0. JENKINS. BAND KNIFE SKIVING MACHINE.

APPLICATION FILED MAY 12, 1902.

N0 MODEL. 7 SHEETS-SHEET 3.

PATEIITED NOV. 22/1904.

G. 0. JENKINS. I BAND KNIFE SKIVING MACHINE.

7 SHEETS-SHEET 4.

APPLICATION FILED MAY 12, 1902.

N0 MODEL.

, 27W H w .WLKH u .m M/ m w w u QW .n 9U 0 m W 2 NW A W w w N 4 V V .M/ W I O I m w w W 0 F 9. Z 0 L A! R l/fi M 00 w J 0 1i .4 4 l vi I11 0 \JW I V w 2 5 n $7,, 4 6 n a u 5 P Z o. 9 a p .5 E6 6 W n 5 0 0/ 0 v PATENTED NOV. 22, 1904.

G. 0. JENKINS. BAND KNIFE SKIVING MACHINE.

APPLICATION FILED MAY 12, 1902.

7 SHEBTS-SHEET 5.

N0 MODEL.

.lllllllllillfl'l No. 775,564. PATENTED NOV. 22, 1904. G. 0. JENKINS. BAND KNIFE SKIVING MACHINE.

. APPLIOATION FILED MAY 12, 1902. I10 MODEL. 7 SEBETS-SHEET 6.

PATENTED NOV. 22, 1-904.

G, 0. JENKINS. BAND KNIFE SKIVING MACHINE.

APPLIGATFEON FILED MAY 12 1902. no MODEL. 7 SHEETS-8311mm No. 775,5e4.

Patented November 22, 1904.

PATENT OFFIQE.

GEORGE O. JENKINS, OF WVHITMAN, MASSACHUSETTS.

BAND-KNIFE SKIVING-MACHINE.

SPECIFICATION formingpart of Letters Patent No. 775,564, dated November 22, 1904.

Application filed May 12, 1902. Serial No. 106,863. (No model.)

To all whom it may concern.-

Be it known that I, GEORGE O. J ENxINs, a citizen of the United Statearesiding at Whitman, in the county of Plymouth and State of Massachusetts, have invented new and useful Improvements in Band-Knife Skiving-Machines, of which the following is a specification.

This invention relates to machines for skiving articles of curvilinear outline, in which the blanks are automatically fed from a pile of said blanks between rolls to a band-knife, one of said rolls being provided with a depression in the periphery thereof of substantially the shape of the skived blank. The article to be skived as it passes through between the rolls is held into this depression by spring-fingers which press the larger part of the blank into the depression, all of the portion of the blank which projects beyond said depression being skived by a band knife which moves lengthwise of said rolls at right angles to the direction of feed of said blank with its cutting edge tangential to said rolls at or along the line of contact between said rolls and the blank, so that the blank to be skived is out along the line where it is held between the rolls.

The object of the invention is to provide a machine which will skive in one operation articles of curvilinear outline, such as shoecounters, and more especially be adapted to skive toe-caps and articles of curvilinear outline formed of soft and flexible blanks of leather and in which it is desirable to have a long skive extending from practically the center of the blank to the outside thereof and terminating in a thin edge on both sides and ends thereof.

To this end the invention consists in a machine of the character described, of a pair of feed-rolls, one of which constitutes a matrix and has a depression in the periphery thereof, means for holding the body of a blank in said depression, and a band-knife located in a plane tangential to said matrix and movable at right angles to the direction of feed of said blank.

The invention again consists in a machine of the character described, of a matrix having a depression in the periphery thereof,

said depression being substantially of the shape of the skived blank. means for holding the body of a blank in said depression, and a band-knife arranged with its cutting edge extending longitudinally of said matrix and tangential thereto.

The invention still further consists in the combination and arrangement of parts set forth in the following specification, and particularly pointed out in the claims thereof.

Referring to the drawings, Figure 1 is a plan view of my improved band-knife skiving-machine. Fig. 2 is a front elevation of the'same. Fig. 3 is an enlarged side elevation as viewed from the left of Fig. 1. Fig. 4 is an enlarged sectional elevation taken on line 4 1 of Fig. 1 looking toward the left in said figure. Fig. 5 is'a sectional elevation taken on line 5 5 of Fig. 1. Fig. 6 is a detail section taken on line 6 6 of Fig. 1 looking tward the left in said figure. Fig. 7 is a detail section, partly in elevation, through the feed-rolls. taken on line 7 7 of Fig. looking towardthe right in said figure. Fig. 8 is a detail section taken on line 5 5 of Fig. 1, illustrating the manner in which a blank is skived.

Fig. 9 is a plan view of the blank before being skived. Fig. 10 is a cross-section of a blank before the same is skived. Fig. 11 is a cross-section of a blank after the same has been skived.

Like numerals refer to like parts throughout the several views of the drawings.

In the drawings, 15 is the frame of my improved band knife skiving machine supported upon suitable legs 16. The band-knife 17 runs around pulleys 18 19, the pulley 18 being the driving-pulley, and the pulley 19 being the driven or idler pulley. The pulley 18 is fast to a shaft 20, journaled to rotate in bearings 21 22. The shaft is driven by a bevel-gear 23, splined thereto and driven by a bevel-pinion 24, fast to the main drivingshaft 25. The main driving-shaft 25 is arranged to rotate in bearings 26 upon the frame 15 and is driven by tight and loosepulleys 27 28, respectively. The band-knife pulley 19 is fast to a shaft 29, arranged to rotate in bearings 30 31.

The band-knife 17 is adjustable laterally by adjusting the shafts 20 and 29, to Which the pulleys 18 and 19 are respectively fastened lengthwise of said shafts, as hereinafter described. The band-knife is tightened by adjusting the shaft 29, together with the pulley 19, fast thereto, away from the shaft 20 and pulley 18. The pulley 18 is adjusted laterally, together with the shaft 20, by the mechanism illustrated in Fig. 4. The said shaft 20 rotates at its right-hand end in a bearing 21, adjustably fastened to the frame 15. Said bearing 21 has a set-screw 32 therein, which bears against the end of the shaft 20 and is locked in position by a lock-nut 33. The left-hand end of the shaft 20, Fig. 4, rotates in a sleeve 34,

fitted into the bearing 22, said bearing having a downwardly-projecting shank 35, integral therewith and arranged to rotate in a bracket 36, adjustable transversely to the shaft 20 upon the frame 15, Figs. 1 and 4. The sleeve 34 is adjusted lengthwise thereof in the bearing 22 by turning the lock-nuts 37 and 38 in the proper direction to draw said sleeve backward or forward through the bearing 22.

The lock-nuts 39 39 at the extreme left of the shaft 20 prevent said shaft from moving longitudinally in the sleeve 34 toward the right, and the shoulder 40 upon said shaft prevents the same from moving longitudinally in the sleeve 34 toward the left, Fig. 4. It will therefore be seen that by turning the lock-nuts 37 and 38 in the proper direction the shaft 20, together with the band-knife 'pulley 18, fast thereto, will be adjusted in a direction lengthwise of said shaft. The shaft 29, together with band-knife pulley 19, fast thereto, is adjusted in a like manner in the bearings 30 and 31. Said bearings are supported in brackets 41 and 42,- respectively, said brackets being adjustable toward and away from the shaft 20 for the purpose of loosening the band-knife or tightening the same, as may be desired.

The blanks 43, Figs. 1 and 5, are illustrated in the present machine as formed of the proper shape and material for toe-caps for boots and shoes. Said blanks are placed one upon the other upon a table 44 with the substantially straight sides of said blanks resting against a vertical wall 45, fast to said table. The lowermost blank 46 of the column of blanks is fed forward between an upper feed-roll 47 and a lower feed-roll 48, hereinafter fully-described, by a feed-finger 49, fast to a slide 50, Fig. 4, arranged to slide upon a vertical flange 51 upon the table 44, said flange forming a guide forsaid slide 50. The slide has a reciprocatory motion imparted thereto by a connecting-rod 52, pivotally connected by an adjustable block 53 to a lever 54, pivoted at 55 toa side frame 56, fast to the frame 15. The lever 54 has a rocking motion imparted thereto by a link 58, pivotally connected to a crank-arm 59, fast to the rotary shaft of the upper feed-roll 47.

The upper feed-roll shaft has a matrix 61 removably fastened thereto. Said matrix is provided upon its periphery with a groove or depression 62, the edges of which are beveled, the shape of the depression corresponding as a whole to the shape of the finished blank. The lower feed-roll 48 consists of a series of disks 63 63, corrugated upon their peripheries and separated from each other by rings or washers 64, said rings and disks being fast to the shaft 65. The lower feed roll shaft 65 has bearings 66 66 in a yoke 67, pivoted at 68 to the side frames 56 and 57, said yoke being forced upwardly by a spiral spring 69.

Between each of the feed-disks 63 is interposed a guide-finger 70, Figs. 5 and 7, the object of said guide-fingers being to hold the blank 46 up into the groove 62 in the matrix as it is being fed through between the rolls 47 and 48 and against the band-knife 17. Each of the fingers 7 0, Fig. 5, is pivoted to a shaft 71, extending transversely between the side frames 56 and 57 and fast at each end thereof to an adjustable bracket 72, pivoted at 73 to said side frames and provided with a slot 74, concentric with the center of the pivot 73 and having a screw 75 extending therethrough and screw-threaded into said side frames 56 and 57 whereby said brackets are locked to said side frames. The guide-fingers 70, Fig. 5, extend toward the right from the pivotal shaft 71 and are guided against lateral movement by a slotted plate 76. tached to the extreme right-hand end of each of the fingers 70, the lower end of said spring being fast to a bracket 77, fast to the under side of the table 44. The downward motion of the right-hand end of the guide-finger 70, and consequently the upward motion of the left-hand end thereof, is limited by a setscrew 78, screw-threaded into a cross-piece 79, extending laterally from the bracket 77. If it is desired to allow the left-hand end of the fingers 7 O topress upwardly to a greater or less extent, the amount to which said fingers may be moved upwardly is regulated by means of the set-screws? 8.

The side frames 56 and 57 are connected together at the top thereof by a cross-head frame 80. vided with ways 81 to receive boxes 82, in which the upper feed-roll shaft 60 is journaled. It will be observed that the cutting edge of the band-knife is. tangential to the feed-rolls substantially at the line of contact between said feed-rolls, and therefore it is necessary that the teeth of the gears 83 and 84, fast, respectively, to the shafts 60 and 65, should not mesh into each other in order that the band-knife may have room to pass between said gears without interfering with the teeth thereof. ln order to accomplish this result and to positively rotate the shafts 60 and 65 through the gears 83 and 84, respectively, I

A spiral spring is at- Each of said side frames is proprovide an intermediate gear 85,which meshes into the gear 83 and also into a gear 86, rotatably mounted upon a stud 87, fast to the side frame 57. The gear 86 meshes directly into the gear 84 and is fast to a gear 88, which meshes into a gear 89, fast to another gear 90, said gear 90 meshing into an intermediate gear 91, which in turn meshes into agear 92, said gear 92 meshing into a gear 93 and the gear 93 meshing into a pinion 94, fast to the main driving-shaft 25. The respective directions of rotation of the different gears hereinbefore enumerated are indicated by arrows in Fig. 3.

The band-knife 17 is guided upon the under side by a bracket-plate 95, supported upon brackets 96 96, fast to the side frames 56 and 57, and upon the upper side said band-knife is guided by a plate 97, adjustably clamped thereagainst by screws 98 and 99, Fig. 6. At the back of the band-knife 17 is a guide-plate 100, which is adjusted toward and away from the back of said band-knife by adjustingscrews 101.

It will be noted that it is very necessary in a machine of the class hereinbefore described in skiving a thin and flexible leather, such as is used for toe-caps, to hold the leather securely and firmly into the depression 62 in the matrix and to hold it substantially along the line of contact of the feed-rolls, said line of contact of the feed-rolls being substantially at the cutting edge of the band-knife, so that there will be no chance for the leather to buckle or bend before it reaches the cutting edge of the knife. To this end the band-knife 17 is made adjustable laterally, as hereinbefore described, and the fingers at the point where they bear against the blank and force the same into the depression 62 are made ad justable toward the right and left, Fig. 5, by means of the construction and means of mounting, hereinbefore described,as it is evident that by loosening the screw and moving the bracket 72 in the proper direction the bearingpoint of the fingers against the leather will be moved toward the left or right, as may be desired. The proper point of adjustment having been secured, said brackets are then looked to the side frames 56 and 57 by means of the screws 75.

The general operation of the machine as a whole is as follows: The blanks 43 are placed upon the table 44, with the substantially straight side thereof against the face of the vertical wall 45. The feed-finger 49 is brought forward by the mechanism hereinbefore described in the proper time to carry the lowermost blank 46 forward between the feed-rolls 47 and 48 and into the depression 62. Said blank is now pressed into the depression 62 by the fingers 70 and held firmly therein by said fingers. At the same time the upper and lower feed-rolls 47 and 48, respectively, carry the blank forward against the cutting edge of the band-knife 17, said band-knife moving radially lengthwise of the feed-rolls in a plane tangential to'the matrix and in a direction at right angles to the direction of feed of said blank. As the blank is fed through it is evident that the portion of said blank which projects beyond the periphery of said matrix will be skived along the line where it is held between said rolls from the main portion of the blank, the skivings passing downwardly, as indicated in Fig. 8, and the skived blank passing upwardly, as indicated in said figure. The action of the knife in skiving the leather blanks hereinbefore described is aided by the plate 97 and bracket-plate 95, which act together as a spreader to spread apart the skived portion of the blank from the skived blank.

I am aware of the patent to A. E.Ayer, Machine for skiving counters, No. 593,409, in which a revoluble disk-like knife is arranged in front of the matrix and in a plane tangential thereto to shear off the projecting edges of the blank in the matrix, but a machine of this construction would be impractical for performing the class of work hereinbefore set forth for the reason that blanks of flexible material would buckle and double up before arriving at certain portions of the cutting edge of the disk-like knife in the Ayer machine, as a portion of the cut of said blanks takes place at an appreciable distance from the point at which said blanks are held in the depression of the matrix. In my machine, as hereinbefore set forth, the blank is held'along a line of contact between the feed-rolls, and this line of contact is substantially coincident with the cutting edge of the band-knife, and therefore there is absolutely no possibility of a blank buckling or doubling up between the point whereit is held againstthe matrix and the cutting edge of the knife.

I do not claim, broadly, in a machine of the character described the combination of a matrix and knife; but,

In View of the facts hereinbefore set forth, whatI do claim, and desire by Letters Patent to secure, is

1. In a machine for skiving articles of curvilinear outline, apairof feed-rolls, one of which constitutes a matrix and has a depression in the periphery thereof of substantially the shape of the skived blank, means for holding the body of a blank in said depression, and a band-knife located in a plane tangential to said matrix and movable at right angles to the direction of feed of said blank, whereby said articles are skived upon opposite sides thereof in one operation.

2. In a machine for skiving articles of curvilinear outline, arevoluble matrix having a depression in the periphery thereof of substantially the shape of a skived blank, means to press a blank into said depression, andabandknife arranged with its cutting edge extending longitudinally of said matrix and tangen- &

tial thereto, whereby said articles are skived upon opposite sides thereof in one operation.

3. In a machine for skiving articles of curvilinear outline, a pair of feed-rolls, one of which constitutes a matrix and has a depression in the periphery thereof, means for holding the body of a blank in said depression, and abandknife arranged With its cutting edge extending longitudinally of said inatrix,substantially at the line of contact of said rolls, and movable at right angles to the direction of feed of said blank, whereby the portion of said blank Which projects beyond the periphery of said matrix is skived along'the line Where it is held between said rolls, and opposite sides of said blank are skived simultaneously.

4:. In askiving-machine, a pair of feed-rolls, one of said rolls provided upon its periphery With a groove of substantially the shape of a skived blank, a band-knife movable at right angles to the direction of feed of said blank, and a suitable guide and spreader to guide the cutting edge of said knife and spread apart the skived portion of a blank from the skived blank.

5. In a skiving-machine, the combination, With a pair of feed-rolls, one of said rolls provided upon its periphery With a groove substantially of the shape of the blanks for receiving and for permitting the holding thereto of the blanks to be skived, said rolls provided With gears independently rotated; of a band-knife traveling between the teeth of said gears at right angles to the direction of feed of said blanks, and a suitable guide and spreader for holding the cutting edge of said knife and for spreading the tWo parts of the cut blanks, substantially as described.

In testimony whereof I have hereunto set my hand in presence of tWo subscribing wit- 4 nesses.

GEORGE O. JENKINS.

Witnesses:

CHARLES S. GooDING, ANNIE J. DAILEY. 

